Post #74
Pete, get rid of the dumpvalve and block the holes up. You don't need a dump valve when your throttle body is up-stream from your charger!
The only way air should be able to get into the system is through the throttle body so block all the other holes up. Other holes after the throttle body will allow un-metered air into the system and it wont run properly.
All your pipes need to be hardpiped, before and after the charger. Under load the pipe between the throttle and the charger will close up and not let air through. The pipes after the charger will close up under closed throttle when there is vac in the system.
As per are pms your pulley ratio should be spot on, I will check the sizes of my pulleys when i'm in the garage later on and let you know for a comparison.
You will see negative boost pressure when at idle and driving around under no load/small throttle openings. You'll see positive pressure when you get the throttle well open and the engine under load.
Your system should go;
Airfilter
Throttle body
Charger
Intercooler
Inlet manifold
All connections as mentioned need to be solid, you can use silicone hose to join solid pipes but only small lengths so they can't collapse.
Probably a daft question but is your charger belt tensioned up properly?
Good luck, al
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www.bridgecraftmotorsport.co.uk
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